﻿//    Copyright 2010,2011 Himanshu Vasishth
//   
//    This file is part of SecretVault.
//
//    SecretVault is free software: you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation, either version 3 of the License, or
//    (at your option) any later version.
//
//    SecretVault is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with SecretVault.  If not, see <http://www.gnu.org/licenses/>.
//
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Common.Exceptions;

namespace PasswordLocker.Controls
{
    public partial class GetMasterPasswordForm : Form
    {
        public string Password { get; private set; }

        public static string AskForMasterPassword(Control parent)
        {
            var masterPasswordForm = new GetMasterPasswordForm();
            var result = masterPasswordForm.ShowDialog(parent);
            if(result == DialogResult.OK)
            {
                return masterPasswordForm.Password;
            }
            return string.Empty;
        }

        public GetMasterPasswordForm()
        {
            InitializeComponent();
            passwordLabel.Text = Resources.PasswordText;
            passwordTextBox.Tag = passwordLabel.Text;

            okButton.Text = Resources.OKButtonText;
            Text = Resources.MasterPasswordFormTitle;
        }

        private void PasswordTextBox_Validating(object sender, CancelEventArgs e)
        {
            var textBox = sender as TextBox;
            if(textBox == null)
            {
                return;
            }

            if(string.IsNullOrEmpty(textBox.Text))
            {
                e.Cancel = true;
                errorProvider.SetError(textBox,
                    string.Format(Resources.EmptyStringError, textBox.Tag));
            }
        }

        private void OkButton_Click(object sender, EventArgs e)
        {
            errorProvider.Clear();
            if(!ValidateChildren())
            {
                return;
            }

            Password = passwordTextBox.Text;
            DialogResult = DialogResult.OK;
            Close();
        }

        public static void GetMasterPasswordAndRunAction(Control parentControl,
            Action<string> action)
        {
            var masterPassword = GetMasterPasswordForm.AskForMasterPassword(parentControl);
            // add the password to the store
            //
            if (!string.IsNullOrEmpty(masterPassword))
            {
                try
                {
                    action(masterPassword);
                }
                catch (Exception lockerException)
                {
                    // TODO: Throw specific exceptions and catch them!
                    // TODO: use a better ui
                    MessageBox.Show(parentControl,
                                    Resources.InvalidMassterPasswordError,
                                    Resources.AppName,
                                    MessageBoxButtons.OK,
                                    MessageBoxIcon.Error);
                }
            }
        }
    }
}
